Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833

603-778-2300 www.wallindustries.com Fax 603-778-9797

CMMM Series

2:1 Input Voltage Ranges

18~30 Watt, Single Output

Chassis Mount DC/DC Converter

Rev A

FEATURES

● Soft Start

● Output Trim

● Single Output

● 1500VDC Isolation

● Efficiency up to 89%

● Remote On/Off Control

● CSA60950-1 Safety Approval

● 2:1 Wide Input Voltage Range

● Complies with EN55022 Class A

● Call Factory for More Output Power Options

● Short Circuit, Over Voltage, and Over Temperature Protected

● Chassis Mount Options: Open Frame, U Channel, and Enclosed Types Available

DESCRIPTION

The CMMM series of chassis mount DC/DC converters offer up to 30 watts of output power. These converters operate over input voltage

ranges of 9-18VDC, 18-36VDC, and 36-75VDC. This series also provides regulated single output voltages of 3.3, 5, 12, and 15VDC. Other

features include remote on/off control, output trim function, and efficiencies up to 89%. All models are over voltage, over temperature and

short circuit protected. The EN55022 Class A conducted noise compliance minimizes design time, cost, and eliminates the need for

external filter components. These converters are best suited for data communication equipment, mobile battery driven equipment,

distributed power systems, telecommunications equipment, mixed analog/digital subsystems, process/machine control equipment,

computer peripheral systems, and industrial robot systems. Chassis mounts come in open frame, U channel, and enclosed types.

SPECIFICATIONS: CMMM Series

All specifications are based on 25°C, Nominal Input Voltage, and Maximum Output Current unless otherwise noted.

We reserve the right to change specifications based on technological advances.

SPECIFICATION

TEST CONDITIONS

Min

Nom

Max

Unit

Input Voltage Range

12V nominal input models

9

12

18

VDC

24V nominal input models

18

24

36

VDC

48V nominal input models

36

48

75

VDC

Start Voltage

12V nominal input models

8.6

8.8

9

VDC

24V nominal input models

17

17.5

18

VDC

48V nominal input models

34

35

36

VDC

Under Voltage Shutdown

12V nominal input models

8.1

8.3

8.5

VDC

24V nominal input models

16

16.5

17

VDC

48V nominal input models

32

33

34

VDC

Reverse Polarity Input Current

All models

2

A

Short Circuit Input Power

4500

mW

Input Surge Voltage

12V nominal input models

-0.7

25

VDC

24V nominal input models

-0.7

50

VDC

48V nominal input models

-0.7

100

VDC

Output Voltage

See Table

Output Voltage Accuracy

±0.5

±1.0

%

Output Trim

±10

%

Load Regulation

Io = 10% to 100%

±0.1

±0.5

%

Line Regulation

Vin = min. to max.

±0.1

±0.3

%

Output Power

30

W

Output Current Range

See Table

Ripple & Noise (20MHz)

55

80

Ripple & Noise (20MHz)

Over Line, Over Load, and Over Temperature

100

Ripple & Noise (20MHz)

10

mVrms

Transient Recovery Time

25% load step change

150

300

μs

Transient Response Deviation

±2

±4

%

REMOTE ON/OFF

Supply On

2.5 to 100VDC or Open Circuit

Supply Off

-1

1

VDC

Standby Input Current

2

5

mA

Control Input Current (On)

Vin – RC = 5.0V

5

μA

Control Input Current (Off)

Vin – RC = 0V

-100

μA

Control Common

Referenced to negative input

PROTECTION

Over Power Protection

110

160

%

Short Circuit Protection

Continuous

Over Voltage Protection

See Table

Over Temperature Protection

Case Temperature, automatic

107

112

117

°C